So I wrote a gift fanfic for a good friend (A), we have given each other gift fics for years. She has given me more but I couldn't think of one for ages, then I came up with the perfect one with all her favourite characters in.
A has a new job so she has been too busy to read it yet but I know she will love it and I love it too, so I continued posting the chapters I'd written so she can see them when she gets back.
But friend B (who I don't know very well at all) started publicly commenting on the gift fic for A saying 'this is what's going to happen, I can see that these characters are going to do XYZ' and complaining that some scenes aren't right.
B has pointed out exactly where I was going to take the story and characters, and so they are posting spoilers.
Firstly, don't spoil someone else's gift fic by giving away details before the giftee has even read it!
Secondly, don't complain because scenes aren't going the way you want, because the gift isn't FOR you. And if you want to read a certain story, write it yourself! Don't tell other writers what to do.
So I removed B's comments, politely explaining that they were spoiling the story for the person I wrote the gift fic for.
But anyway, I've now decided to take the story in another direction thanks to B's interference, so I don't know if it will be better or not. It's just rude and thoughtless of friend B, it's not good fanfic etiquette to spoil fics like that.
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That alien woman. On Earth to observe and wonder about homo sapiens.